build-size

Parse and compare build size

Install

Install locally with npm:

$ npm install --save-dev build-size

Install globally with npm:

$ npm install --global build-size

Basic usage

Locally with npm:

# Display help
$ npm run build-size -- --help

# Parse
$ npm run build-size -- parse ./previous/**/*.js ./previous/**/*.css > previous.json
$ npm run build-size -- parse ./new/**/*.js ./new/**/*.css > new.json

# Compare
$ npm run build-size -- compare previous.json new.json

Globally:

# Display help
$ build-size --help

# Parse
$ build-size parse ./previous/**/*.js ./previous/**/*.css > previous.json
$ build-size parse ./new/**/*.js ./new/**/*.css > new.json

# Compare
$ build-size compare previous.json new.json

Example output

Parse:

$ build-size parse js/*.js css/*.css

{
  "js/app.js": 133104,
  "js/manifest.js": 1478,
  "js/vendor.js": 466292,
  "css/app.css": 24491
}

Compare:

$ build-size compare previous.json new.json

This change will increase the build size from 610.71 KB to 616.04 KB, an increase of 5.33 KB \(1%\)

File name | Previous size | New size | Change
--- | --- | --- | ---
js\/app.js | 129.98 KB | 135.32 KB | ![▲](https://swisnl.github.io/build-size/images/increase.svg "Increase") 5.33 KB \(4%\)
js\/manifest.js | 1.44 KB | 1.45 KB | ![▲](https://swisnl.github.io/build-size/images/increase.svg "Increase") 2 B \(0%\)
js\/vendor.js | 455.36 KB | 455.36 KB | 0 B \(0%\)
css\/app.css | 23.92 KB | 23.92 KB | 0 B \(0%\)

Testing

$ npm test

Contributing

Please see CONTRIBUTING and CODE_OF_CONDUCT for details.

Security

If you discover any security related issues, please email [email protected] instead of using the issue tracker.

Credits

Inspired by BuildSize and similar projects, such as bundlesize and Size Limit.

License

The MIT License (MIT). Please see License File for more information.

SWIS

SWIS is a web agency from Leiden, the Netherlands. We love working with open source software.